Here is a rundown of the major new features and improvements:# Image Effects: New Depth of Field with fantastic bokeh, improved bloom and several other image effect tweaks and fixes.# New Water: All new Water prefab in standard assets that includes waves, automatically generated foam on shorelines and more. It even has a full fledged editor – make those oceans come alive.# Graphics: Major performance improvements in OpenGL ES 2.0 (iOS/Android).# Shaders: Added optimized/simplified versions of some shaders under “Mobile” category (VertexLit, Bumped Specular, Skybox). They work on other platforms as well, but mobiles will see biggest gains. Bumped Specular is 5.3x faster on iPhones.# Shaders: Added several Unlit shaders that just display a texture with no lighting. They are the fastest textured shaders.# Debugger: Attaching the script debugger to (and detaching from) Unity and debugging-enabled players is now possible.# Profiler: you can profile standalone player builds from the Editor. This includes iOS and Android builds!

For a full list of all of the updates fixes and improvements, head over to the release notes.

Or simply go directly to the download link here and get stuck in with all the cool new stuff.